by Staff Writers
Geneva, Switzerland (SPX) Jul 07, 2017
An international team of astronomers, including members of the University of Geneva (UNIGE), Switzerland, discovered an exoplanet by direct imaging using SPHERE, an instrument designed and developed by a consortium of 12 European institutes on the Very Large Telescope ESO, based in Chile.
The instrument, which corrects in real time the terrestrial atmospheric turbulences and occults the light of the star, allows to take a real "photography" of the exoplanet. A result published in the journal Astronomy and Astrophysics this week.
While more than 3600 exoplanets were discovered through indirect methods, only a handful of them could be observed by direct imaging. This is the first time that astronomers have been able to discover a planet directly on a "photography" with SPHERE, an instrument designed and developed by a consortium of 12 European institutes, including the UNIGE Astronomical Observatory.
In order to take this kind of image, SPHERE is equipped with a deformable mirror that corrects 1200 times per second in real time the atmospheric turbulences, and with a coronograph which allows to hide the light of the star and reveals that of the planet. SPHERE is able to detect the signal of a planet up to a million times lower than that of its host star.
Installed on the VLT (Very Large Telescope) in Chile, SPHERE then discovered HIP65426b, an exoplanet located at three times the Earth-Neptune distance from its star, and whose mass is 6 to 12 times higher than that of Jupiter with a temperature in the range of 1200 degrees celsius.
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Hull UK (SPX) Jul 07, 2017
Astronomers Dr Jane Greaves, of the University of Cardiff, and Dr Wayne Holland, of the UK Astronomy Technology Centre in Edinburgh, may have found an answer to the 25-year-old mystery of how planets form in the aftermath of a supernova explosion. The two researchers will present their work on Thursday 6 July at the National Astronomy Meeting at the University of Hull, and in a paper in Monthly ... read more
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